India's Karni Mata Rat Temple

A carving from the Karni Mata temple By dalbera from Paris, France, via CC-BY 2.0 license

Though it's most famous for its rats, the story of this temple starts with Hindu goddess Durga and Karni Mata, a 15th-century mystic believed to be her incarnation. The reason for the rats in Karni Mata's temple is a combination of legend and devotion.